[Devel] Re: [Test Result] I/O bandwidth Control by dm-ioband - partition-based environment

[Dong-Jae Kang]

Hi Ryo

2009/8/27 Ryo Tsuruta <ryov at valinux.co.jp>

> Hi Dong-Jae,
>
> # I've added dm-devel to Cc:.
>
> Dong-Jae Kang <baramsori72 at gmail.com> wrote:
> > Hi Ryo
> >
> > I attached new test result file(ioband-partition-based-evaluation.xls)in
> > this mail.
>
> Thanks for your great job.
>
> > In this time, it is not virtualization environment.
> > I evaluated partition-based use cases before I do it in vitualization
> > environment.
> > because I think the two cases are smilar each other.
> >
> > The detailed information about the evaluation can be referred in attached
> > file.
> >
> > If you have any questions or comments after examine it,
> > please give me your opinion.
>
> I would like to know the throughput without dm-ioband in your
> environment. Because the total throughput of range-bw policy is
> 8000KB/s, which means the device has a capability to perform over
> 8000KB/s, but the total throughput of weight policy is lower than
> the range-bw policy. In my environment, there is no significant
> difference in average throughput between with and without dm-ioband.
> I ran fio in the way described in your result file. Here are the
> results of my environment. The throughputs were calculated from
> "iostat -k 1" outputs.
>
>            buffered write test
>           Avg. throughput [KB/s]
>        w/o ioband     w/ioband
> sdb2         14485         5788
> sdb3         12494        22295
> total        26979        28030
>

OK, good comments.
I omitted the total bandwidth of the evaluation system.

I will reply to you about it tomorrow after I check and re-test it again.

>
> Thanks,
> Ryo Tsuruta
>

Thank you for comments.

-- 
Best Regards,
Dong-Jae Kang
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